Gas ob



L. P. LOWE.

GAS 0R VAPOR HEATER. APPLICATION FILED MAR.27,1919.

Reissued June 29, 1920.

FIG./

FIG. 2

i s r'r F E mom 1'. LOWE; 0mm FRANCISCO, (CALIFORNIA,

ens on; VAPOR/ HEATER.

Specification'nfLReissued Letters Patent; Reissued: J 1111929; 1920;

orizinufm; 1,27s;6ae;,datea-;rin 2a; 1918; Serial No.*154;ee1,- med- March 1'5, 191?. Application for relisue-dled' liarclr 27, 1919; Serial No. 285675;

To all'w'home'tmay concern Be itiknown that I LEONP; Lowe, acitizen of-i the United States, residing at San- Francisco, in the county of: San Francisco 1 and State of California, have inventednewand useful? Improvements in Gas or Vapor Heaters, of which the following is a speci ficatiom Of the numerous attempts that have been made to devise gas stoves-j for heating rooms and" apartments not provided with chimney flues, none has hitherto been completely-5' satisfzicto'ry. Manygas heaters discharge the products of eombustien-directlyinto the room,- to which a there ;is no considerable ob- I jection" if the gas completely hurried;

Since gas, as now" supplied by: properly- -e uipp'ed'utilities; is nearly always purified} 0 sulfurand other deleterious com-pounds",

the complete" products' of combustion are merely harmless carbon di'oxid' and water vapor, whicharethe same as"-'t'hose exhaled designedly caused to, or inadvertently allowed to, impinge upon any-material from which the heatis' direoted orradiated into:v the room; then: incomplete" combustionds apt to, and frequently does, result: when-- incomplete combustion occurs, there are generated carbommonoxid, acetylene and other objectionableand deleterious productswhich: give rise to the well-known sickly odors, perceived in a room heated byv heat e'rs" having' no flue connectionsa' To obviate the above+mentioned unpleasant odors and other ill-effects; resulting from incomplete combustion of'gas, the tenderrcyis"- now to provide rooms 1 with flues' for carrying ofi these products," With the result that a very large percentage of the"- heat-' value of; the

gas is wasted? Althoughm p'leinL-flani'e' burner sometimes gives completecombustion under ideal conditions, these-'- conditions" do not often ob-- tain', and have not"heretofore designedly' existed" in an 'efl'ieient; scientifically con structed' gas or f vapor burning heater:

As fitted with both Bunsen and; plainflame burners, the construction of'heaters" has hitherto generally" been suchthat the products of combustion are discharged di rectly upward, but a far more efiicient re-' sult is obtained by forcefully dischargin' the products of combustionta'nd' air-'heat'e thereby, f horizontally into aroom rather than vertically upward, as," in the latter case, most of the heat at once passes-to thetop of the room without mate'rially benefit= mg the occupants.

The object of'the present invention is to 4 provide a heater in-which'the products of combustion will be'complete, and in'whichi all'of the heat value of the fuel will be-efli cienbly utilized, and in"whicli the heat oil?" combustion will be discharged horizontally both byradiationand" con=' into the room 7 vection.

tion.

top of said burnerare-a series- 0f holes forming independent gas outlets, sufliciently close to each other so that" thegas= issuing fromall may be ignited by lighting-' any one 1.

Referring to the drawing: 1 indicate's a gas burner, the passage of gas through: which is controlledby a valvei2. In the of them; If desired, lava- 'bat wingrtips may be inserted into holes in burner 1,- to give broad flat flames, and tips with roundi holes may be' u'scd, or: agsingle'narrow slot.

These Variations, however, form no partiof my present invention. Behind said burner is i an insulating airchamberl having aL-verticalF lower portion, a horizontal upper portion, and a curved'intermedi'ate portion, this in sulating chamber bein for the purpose of protectingthe'" walls o rooms or other-surf facesa'gainst which the heater may be placed, and also for the purpose of causing the" radiation of an increased amounti'of heat'from the'outer surface'ofwall 7." Falls -v by end walls 8:1 and? 7 and 5 are supported the base 9. i a

By means of. thehorizontal uppen'portionz of the front'wall 7 the heatioficombustionz moving aboutin the room, but 'uninclosed' level. I, therefore, protect from" such air currents the flames fromthe burner outlets- ;small openings into the base:9 but I also of the gas from the burners is discharged by convection into the roomin a substantiallyhori zontal direction, while the curved surfaceof the wall 7 projects the heat sub-l stantially horizontally by radiation.

It is well known that, while a plain flame burner can be made to give complete combustion of gas, it will not do so if the surrounding the flame is considerably dis-v turbed by' currents, 'NVlllCll-lS illustrated by the fact that there is no objectionto the use of uninclosed gas flames for lighting pur-J poses, when placed at a considerable height in a room, where they" are practically unaffected because of-the absence of air currents,

which currents are largely caused: by people flamesv become objectionable if they are placed at a lowlevel in the room where they are materially. disturbed and affected by currents which are frequent at theplower 3 by not only causing the air supplied to the gas to flow gently through the bafiling interstices of the woven wire 11, or through other provide a shield 12, preferably of transparent material suchas glass, in front of, close to, and of a greater height than, said flames,

the ends ofsa'id plate being preferably;con-

-tained: in grooved holders 13, secured. to, or

formed in, the end walls 8 of the heater. If

only to insure perfect combustion of the gas, this plate might bemadeof any solid incombustible material, but a transparent plate enables one to see at, a glance whether,=in

' lighting the heater, any burner has escaped being lighted. Moreover; the visible flames produce a more pleasant effect, which may be varied-by using art, .or'colored glass instead of plaintransparent glass. 1

Theplate 12 is also so designed and placed as to form a narrow flue which causesthe heat of combustion to be'ejected first up-' wardly, and-then horizontally, with considerable force, therebymoreperfectly heating the room. i yIn the formsofthe invention shownfiin Figs. 2 and 3,-the air passages 14, leading to the -burner,'-are contracted, the top. of the V base of theheater having,'in Fig. 2, a plain sloping surface 16, to: conform to a gas burnerof trapezoidal cross-section, and in:

Fig. 3 a curved surface 17, toconform to a gas burner of circular cross-section, both of, l the forms being ofimproved and scientificv des" n.- i

. Thus the following advantages result? froni'my improved construction and render it a perfectand efiicient gasheater.

There is a complete combustion of the gas at all times; th'e'heat" of combustion is discharged horizontally into" the room by both;

radiation and convection; flames are visible; all heat is utilized and none allowed to waste, giving IOOfperiCDh Ciency; all flames can be ignited with a single movement; the position ,of the flames is such that' it will at once'be seen whether any gas has not been ignited; the conveyed heat is jprpje'cted horizontally with considerable force.

It'will be obvious that this heater 'can 'bt made in a variety of. shapes and designs,- but; P efer" e s sho By a narrow flue in the claims is meant oneof which theawalls areso close together that the air, is drawn upward into the flue by theheat of the flames of the burner with such 'velocity that theflames of the burner arefsteady, as distinguished fromv a;.flu'e of.

which thewalls are spaced-apart so far. thatthe combustion approximates that, in an open room. This difference resemblesthat between a; lamp 'chimney so, narrow as to bringthejair therein into intimate contact} 5 with the gaseous fuel and. producepperfect combustion, and one which is too wide andin which consequently the flame is wavering and unsteady. In the-latter case imperfectcombustion is taking;place, with1the con-sequent injection into the room of unburnt and deleterioust gases, and [in the former case perfect combustion takes place with no injurious eflects; ,-This form of'flue in a.

vapor heater of this character is believed to be novel in m'yi-nvention. This narrow flue possesses the additional advantage .that products ofcombustion and'heated air are forced upwardlywith great velocity and are, discharged for-.v wardly into the roomto a much greater'dist oftranslucent material in front of all fuel outlets of the heater, a wall, of which a lower portion extends upwardly behind said outlets, and an upper portion extendsover the top of saiditranslucent sheet. and forwardly thereof, saidsheet and wall being spacedfrom, the outlets sufficiently to form a flue discharging at; itsy-upper portion forwardly into-the.room,.;and means forgremovably supporting'saidsheet in. a'position inwhich itsupper edge extends higher thanv the i-flames. from-flthefuel burning at. all of said outlets and air is prevented from passa ing around its lower edge and ends.

.. 2. A gas or vaporconsumin'g heater comprising a burnerhavingg'a; linearseries of fuel outlets, an air-conduit leading upwardly to said outlets, a translucent wall in front ofv all fuel outlets of; the heater,-a wall, ofwhich a lower portion extends upwardly behind said outlets, and an upper portion extends over the top of said translucent wall, said Walls bein spaced from the outlets sufiiciently to orm a flue discharging at its upper portion forwardly into the room, and means for removably supporting said translucent wall in a position in which its upper edge extends higher than the flames from the fuel burning at all of said outlets and 10 air is prevented from passing around its lower edge and ends.

' L. P. LOWE. 

